"It's an RNC event, but not one to endorse any candidate or party," a source tells E! News. "I believe Journey and also Zac Brown [also on Thursday] are described as nonpartisan but they aren't aware of any of the details themselves. To Journey, it's simple, one of hundreds of private [events] they get hired to do."

And the price tag for such a gig seems pretty steep.

Our source also confirms that the band was paid a whopping $500,000 to perform.

Kid Rock, Trace Adkins, Lynyrd Skynyrd, Oak Ridge Boys and Lee Greenwood are also scheduled to perform at private events during the convention.